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2023 AQA A-level PHYSICS 7408/1 Paper 1 Question Paper & Mark scheme (Merged)
June 2023 [VERIFIED]
A-level
PHYSICS
Paper 1
Wednesday 24 May 2023 Afternoon Time allowed: 2 hours
Materials
For Examiner’s Use
For this paper you must have:
• a pencil and a ruler Question Mark
• a scientific calculator 1
• a Data and Formulae Booklet
2
• a protractor.
3
Instructions 4
• Use black ink or black ball-point pen.
5
• Fill in the boxes at the top of this page.
• Answer all questions. 6
• You must answer the questions in the spaces provided. Do not 7–31
write outside the box around each page or on blank pages.
TOTAL
• If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s).
• Do all rough work in this book. Cross through any work you do not
want to be marked.
• Show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 85.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN237408101*
IB/M/Jun23/E8 7408/1
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0
0 1The neutral lambda particle Λ is a baryon with a strangeness of −1
0
One possible decay for a Λ is
0 0
Λ →π +n
0
0 1. 1 Deduce the quark structure of a Λ .
[1 mark]
0 1 . 2State and explain which interaction is involved in this decay.
[2 marks]
0 1 . 3 An antiparticle of the neutral lambda particle decays into a neutral pion and particle X.
Identify X.
[1 mark]
*02*
IB/M/Jun23/7408/1
, 3
Do not write
outside the
0
0 1 . 4The rest energy of a Λ is equal to the energy of a photon with a frequency of box
23
2.69 × 10 Hz.
0
Determine, in MeV, the rest energy of a Λ .
[1 mark]
rest energy = MeV
0
0 1 . 5 The discovery of particles such as the Λ is made by large international
research teams.
Suggest one reason for this.
[1 mark]
6
Turn over for the next question
Turn over ►
*03*
IB/M/Jun23/7408/1
, 4
Do not write
outside the
There are no questions printed on this page box
DO NOT WRITE ON THIS PAGE
ANSWER IN THE SPACES PROVIDED
*04*
IB/M/Jun23/7408/1
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